drive lights post pylon Red Light streets traffic traffic light traffic lights cutout isolated lamp roadsign caution fire go green red road sign signs stop street transport walk way city city traffic dark darkened directions early evening hazy lighting pedestrian bridge pedestrians rain reflecting reflections road conditions road curve shining shiny Singapore street light traffic flow vehicles weather wet colors semaphore traffic colors ligths animal bicycle bike crossing cycle horse horses light London rider railroads train trains warning communication highway intersection interstate street scene traffic sign visual visual communication yield